Same-side interior angles (SSIA) is a theorem in geometry that states that the sum of same-side interior angles is 180 degrees. When two parallel lines are intersected by a transversal line, they form four interior angles. The two interior angles that are not adjacent and are on the same side of the transversal are called consecutive interior angles.
Similar to consecutive interior angles, these pairs of angles are on the same side of a transversal line and inside the two parallel lines. The SSIA theorem states that the interior angles on the same side of the transverse line are supplementary to each other, and since they both add to 180°, a missing angle can be solved for by subtracting the known angle from 180°.
The SSIA theorem is applicable when two parallel lines are cut by a transversal. The sum of any pair of same-side interior angles will always equal 180 degrees.
To solve for x, set up an equation and remember that same-side interior angles add up to 180 degrees. This geometry video tutorial provides a basic introduction to corresponding angles and same-side interior angles, as well as the converse of the SSIA theorem.
📹 Corresponding Angles and Same Side Interior Angles – Geometry
This geometry video tutorial provides a basic introduction into corresponding angles and same side interior angles also known as …
📹 Finding the Value of an Angle Using Same Side Interior Angles
Learn how to solve for an unknown variable using parallel lines and a transversal theorems. Two lines are said to be parallel …
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